[Lowfer] WG2XRS 72.401...

[Bob Raide]

Jay;
>From the tremendous voltage at the base I would say maybe under 10 ohms.  I can draw a 2 inch arc off a screw driver!  I have a hotwire amp meter and will stick it in line later and get an idea.  I just rolled out one 150' chicken wire radial to the NE to maybe help things abit.  I am going to add a few more long radials this fall to try and get the best ground system I can.
I would say the safest level is about a KW for me to use.  I would guess that would be maybe .5 W ERP[?] with ground system out.
 
> From: jrusgrove at comcast.net
> To: lowfer at mailman.qth.net
> Date: Sun, 8 Sep 2013 12:33:01 -0400
> Subject: Re: [Lowfer] WG2XRS 72.401...
> 
> Bob
> 
> Was wondering what your antenna R is without the ground system. Do you have an rf ammeter in the 
> antenna lead? The better ground system is only going to make the arcing situation worse.
> 
> Some quick calculations assuming antennas like you and I have ... at 72.4 kHz:
> 
> 1200 watts / total antenna R=40 ohms (poor ground system) ... 16.4 kV at top of loading coil
> 
> 1200 watts / total antenna R=10 ohms (excellent ground system) ... 32.8 kV at top of loading coil - 
> yikes!
> 
> Much over 20 kV requires good insulation, corona rings etc - damp wx can be a show stopper. Good 
> idea to have a fire extinguisher handy for 73 kHz 'high power' operations!
> 
> Jay
> 
> 
> 
> ----- Original Message ----- 
> From: "Bob Raide" <rjraide at hotmail.com>
> To: "Bob Raide" <lowfer at mailman.qth.net>
> Sent: Sunday, September 08, 2013 12:04 PM
> Subject: Re: [Lowfer] WG2XRS 72.401...
> 
> 
> > Tnx Jay for great report.  Have couple minor issues-high voltage at vert input flashing 
> > occasionally  but otherwise no problem at 1200 W. Backed off to 1 KW and fine so far!
> > Got some good reports over night out to 800 miles or so and JD listening this morning.  Got to get 
> > ground system out before all tunes up properly.
> >
> >> From: jrusgrove at comcast.net
> >> To: lowfer at mailman.qth.net
> >> Date: Sun, 8 Sep 2013 11:11:23 -0400
> >> Subject: Re: [Lowfer] WG2XRS 72.401...
> >>
> >> Bob
> >>
> >> Signal off back of antenna http://www.w1vd.com/grabber.html . Quite audible off the front of the
> >> antenna. Distance 288 miles. No interference and low static levels at the moment - could hear a 
> >> pin
> >> drop on the frequency.
> >>
> >> Jay W1VD
> >> WD2XNS
> >> WE2XGR/2
> >> WG2XSR/2
> >>
> >> ----- Original Message ----- 
> >> From: "Bob Raide" <rjraide at hotmail.com>
> >> To: "Bob Raide" <lowfer at mailman.qth.net>
> >> Sent: Sunday, September 08, 2013 11:02 AM
> >> Subject: [Lowfer] WG2XRS 72.401...
> >>
> >>
> >> > Will be changing over to QRSS60 from 45 and on for few hours daytime-Bob
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